Spirogyra is an example of which of the following algae?

Correct option is D

The correct answer is (d) Green algae
Explanation:
· Spirogyra is a genus of filamentous green algae found in freshwater.
· It is characterized by spiral chloroplasts, which help in photosynthesis.
· It reproduces by fragmentation and conjugation (a sexual process).
· It belongs to the Chlorophyta division.
· Commonly called pond silk due to its slimy texture.
Information Booster:
· Spirogyra is non-motile and floats on still water surfaces.
· It is an autotroph, using sunlight for food production.
· Plays a role in the oxygenation of water bodies.
· It's used in studies of plant biology and reproduction.
· Over 400 species of Spirogyra are known globally.
Additional Information:
· Red algae (Rhodophyta) – Found in marine waters; contain phycoerythrin pigment.
· Brown algae (Phaeophyceae) – Mostly marine; include kelp and sargassum.
· White algae – Not a biological classification; not a real category in algal taxonomy.